Influence factors and mechanism of removing fluorides with Fe-Type Sepiolite

Author

Yan, Zichun ; Zhang, Guozheng ; Yang, Jiaping ; Nartey, Obemah David ; Xie, Zhaoge

Author_Institution

Sch. of Environ. & Municipal Eng., Lanzhou Jiaotong Univ., Lanzhou, China

Volume

4

fYear

2011

Firstpage

2955

Lastpage

2958

Abstract

A highly efficient new fluoride absorbent was prepared by modification of sepiolite with an iron chloride. The effects of absorbent size, duration, pH, raw concentration, co-existing anions on removal efficiency of fluoride were investigated. The experiments indicated that Fe-Type Sepiolite is an effective fluoride absorbent with the removal efficiency above 95% by dosage of 2 g/100ml and duration of 40 min. The optimum range size of the absorbent is between the range of 0.-1.25 mm, and pH is partially sub acidity or neutral. Co-existing anions such as NO₃^- and SO₄^2- has a little Influence on adsorption of Fluoride. According to the analysis of adsorption isotherm and regeneration of Fe-Type Sepiolite, the mechanism of adsorbed fluoride is mainly by chemical adsorption.

Keywords

absorption; chemical industry; chemisorption; fluorine compounds; iron compounds; Fe-Type Sepiolite; chemical adsorption; fluoride absorbent; fluoride removal; iron chloride; pH; raw concentration; Chemicals; Effluents; Ions; Magnesium; Minerals; Presses; Fe-type sepiolite; adsorbent; fluoride removal;

fLanguage

English

Publisher

ieee

Conference_Titel

Water Resource and Environmental Protection (ISWREP), 2011 International Symposium on

Conference_Location

Xi´an

Print_ISBN

978-1-61284-339-1

Type

conf

DOI

10.1109/ISWREP.2011.5893497

Filename

5893497